The purpose of SMTP server
in our company , we have 2 Mailbox servers Members of a DAG
2 other servers are CAS/HUB roles on each server.
in the topology(diagram) , they have an SMTP server, I believe it is installed within Load balancer (I could be wrong), but I can ping the smtp server from within the network ex: ping smtp1.domain.com... I am sure it is not a windows box...because I tried the command Systeminfo /s smtp1.domain.com... it did know the system.
Our Scanning box for email Spam and email viruses is hosted online by Micrsoft TMG.
So, my Question is why would they have an SMTP server (it can be an appliance or whatever)?
I though Exchange server is already an SMTP server....
Any idea ?